Machine for creasing paper



(No Model.) 2 Sheets-Sheet 1.

J. E. STANNARD.

MACHINE FOR OREASING PAPER. NO. 298,425. Patented May 13. 1884.

N. PETERS. Hula-W. w-minm. 9.6.

(No Model.) 2 SheetsSheet 2.

J. E. STANNARD.

MACHINE FOR OREASING PAPER.

No. 298,425. Patented May 13, 1884.

Ta zf I ll $622477,

u. PETERS. Puma-Lithographer, vlnlhingtun. n a

STATES JOHN E. STANNARD, OF SPRINGFIELD, MASSACHUSETTS.-

MACHINE FOR CREASING PAPER.

SPECIFICATION forming part of Letters Patent No. 298,425, dated May 13, 1884.

Application filed December 30, 1882. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN E. STANNARD, of Springfield, in the county of Hampden and State of Massachusetts, have invented a new and useful Improvement in Methods of and Machines for Greasing Paper, of which the following is a specification and description.

The object of my invention is to provide a method whereby to form the creases in sheets of paper, preparatory to folding them, in the manufacture of paper boxes and similar articles, without breaking or injuring the body of the paper at the line where the crease is made; and I accomplish this by the, method and mechanism substantially as hereinafter described, and illustrated in the accompanying drawings, in Which- Figure I is an end view of a machine made to carry into efiect my invention for creasing paper. Fig. II is a side view of the cam which actuates the plunger in causing contact between the creasing-blade and the matrix. Fig. III is a plan View of the machine. Fig. IV is part front view and part section on line A of Fig. III; and Fig. V is a transverse sectional view of the plunger in which the matrix is secured, and of the platen or bed to which the creasing-blade is secured, and showing the table and inclined spring-guide secured thereto,

said section being at line B, Fig. IV.

In the drawings, 1 represents a frame which is fixed or stationary, and which is provided with a vertical guideway at each end, preferably dovetailed at its sides, as shown in Fig. III at 25; and a shaft, 9, has its journal-bearings in this frame, to revolve therein, with a cam, S, fixed to each end of said shaft just outside the frame, said cam consisting of a disk provided on the inner face with a groove, 20. A guide-bar, 2, is fitted to slide freely in the vertical guideway 25, in each end of the frame, and these guide-bars have an opening near the upper end, as at 26, and an adjustingscrew, 6, is turned down through a threaded hole in the top of said guide-bar into said opening 26, and set-screws 4 are turned through the bar 2 from either edge into said opening, as shown clearly in Fig. I. A plunger-bar, 3, extends across the frame from end to end, with the ends of said bar projecting into or through the openings 26 in the guide-bar, with a spring placed in each said opening and beneath each end of the plunger-bar, to keep the latter always held against the lower end of the adjusting-screw 6; and when the ends of the plungerbar are adjusted at the proper height the setscrews 4. are turned in firmly against said bar to hold it securely in its adjusted position in the opening 26 in each guide-bar. The lower straight portion of the plunger-bar is provided with a dovetail recess, 34., extending along its length, in which I secure, by means of a clamping-bar, 27, a matrix, 14, made of some yield ing or elastic substance, as rubber or guttapercha. This matrix may be made of some rigid material, if preferred; but a yielding matrix gives better results and insures better creasing of the paper. A platen, 15, is firm 1y secured to the frame 1, and the creasingblade 13 is firmly secured to this platen directly beneath the matrix 14, and a table or platform, 16, is secured to the frame, upon which to lay the paper before and after being creased as the creasing process proceeds. This platen 15 extends back in rear of the creasing-blade, and is provided with a journal box or bearing, 21, made on its lower side, at the rear, in which is a screw, 17, having a shoulder each side of the box to prevent the screw from moving lengthwise. A gage, 11, lies upon the platen, with a lug made on its lower side projecting down into a slot, 28, in

the platen, as shown in dotted lines in Fig. I,

and a nut, 19, arranged to slide to and fro in the lower portion of the slot in the platen, is clamped to the gage and to the lower side of the platen by a clamping-screw, 18, turned down through the gage into the nut when desired. The front side of said gage has two or more blocks, 52, secured thereto, against which the edge of the sheets are held while being creased, so that should some of the sheets be curved at the edge, as they impinge against the blocks only, instead of against the whole length of the gage, this curvature of the edge will not be indicated or shown in the scoring or creasing. "When it is desired to move the gage either more or less remote from the creasing-blade, the clamping-screw 18 is loosened and the adj listing-screw 17 is turned either in or out of the nut, and when this gage is ad-.

justed to the desired position, it is then secured by turnin gin the clamping-screw, which clamps the nut firmly to the lower side of the platen and the gage to its upper side. A stud, 7, is bolted firmly into each of the upright movable guide-bars 2, upon the outer end of which stud may be a small roll projecting into the groove of the cam, to lessen the friction of the stud moving in the groove; and this groove being eccentric with the shaft 9, as the latter and the cams 8. thereon revolve, the latter actuates the guide-bars 2 up and down in the guideways, and. the plunger 3, secured to the guide-bars, forces the matrix into contact with the creasing-bladel3, at each downward movement of the plunger, and, if a sheet of paper is held between, a crease is made therein. A sheet of suitable metal, 50, is secured to the table at its lower edge into an inclined position with its upper edge near to, and at height alittle above the creasing-blade and which, when in this position, is a little elastic, so that when the plunger is forced down the upper part of the sheet is forced down thereby sufficiently to permit the paper to be creased; and when the plunger moves up again this metal guide will spring up again to its position a little above the plane of the creasing-blade. This guide may be made of wood, and be held up by springs placed beneath; but I prefer to make it of metal, as

' above described. As the sheets of paper are pushed in by the operator, to be creased, this guide prevents the edge of the sheet from abutting against the creasing-blade, and insures its entrance between the matrix and creasingblade.

In creasing paper with the ordinary machines in use, when the crease is made by a single blow of a creasing-blade against a matrix, the blow is required to be so hard that the fiber is broken or the flexible character of the paper at the creased line is destroyed, especially in the cheaper grades of paper, and the paper is often broken at the first attempt to fold it, from this cause. T0 remedy this difficulty I cause the creasing-knife or the matrix, whichever is attached to the plunger, to make two separate and distinct downward movements in quick succession, the second more pronounced and full than the first, the first downward movement being just sufficient to compress and slightly indent the line in the paper, and the second and further downward movement to more firmly compress the paper at the crease made by the first movement. I accomplish this by making the groove 20 of the cam of a general circular form in the inner face of the disk 8 around the shaft, but eccentric with the latter, and with two inward trends toward the shaft 9one at 21 and the other at 23, the latter extending inward nearer the shaft than the other-and with an outward swell or trend, as 22, between them, as shown clearly in Fig. II. As this cam revolves, the

stud-and its roll are caused to follow around in the groove 20, and as it moves into that part of the groove farthest from the shaft 9, the guide-bars with the plunger and matrix are moved upward; but when the stud moves into the first inward trend, 21, of the groove, the plunger and matrix are moved down quickly, to give a slight compression of the matrix against the creasing blade, which slightly creases the paper between. As the stud 7 passes out of the first trend, 21, it is carried outward slightly from the shaft; but as the stud enters the second trend, 23, it is thereby carried inward nearer to the shaft than when in the trend 21, and the plunger and matrix are caused to make a second and harder compression upon the creasing-blade, and finish the crease which was partially made by the first compression, these two compressions of the matrix against the creasing-blade being made in quick succession. By making these two compressions in quick succession,

the second harder than the first, I am enabled to crease a very ordinary and cheap grade of paper in the manufacture of boxes without breaking or injuring the paper at the creased line, which is a matter of no little difficulty with the ordinary creasing-machines.

It is evident that the creasing-blade 13 may be secured to the plunger, and the matrix be secured to the platen, without departing from the invention in the least, as it is immaterial which is uppermost, the creasing-blade or the matrix, so far as the practical operation of the machine is concerned.

Though I have described with great particularity the machine which I prefer and deem best adapted to operate my hereinbefore-described method of creasing or scoring, I do not wish to be understood as thereby limiting myself to the specific machine described,

or thereby waiving any claim to the invention of such method and its results, broadly, a principal feature of my invention being the said method of creasing or scoring paper and kindred substances by successive blows or pressures, the first of which is lighter than the following one, preparatory to bending the same, for use in the manufacture of paper boxes and similar articles.

' Having thus described my invention, what I claim as new is 1. In the art of scoring or creasing paper or other kindred substances preparatory to bending the same for use in the manufacture of paper boxes and similar articles, the step herein set forth, which consists in making the crease or score by means of successive blows or pressures, the first of which is lighter than the following one.

2. The within-described method of creasing paper or kindred substances for use in the manufacture of paper boxes and similar articles, consisting in subjecting the material to be creased to an initial pressure between a matrix and creasing-blade, discontinuing that pressure, and afterward repeating it with greater force.

3. In a machine for creasing paper or kindred substances, the combination of cam-disks with a creasing-blade, plunger, and suitable guide-bars, such cam-disks being provided with grooves, and such grooves being so shaped as to cause said plunger, when connected with said cam-disks by suitable guides, to give successive creasing blows or compressions at each revolution of the cams, the first of which blows shall be lighter than the following.

4. In a machine for creasing paper or kindred substances for use in the manufacture of paper boxes or similar articles, an inclined yielding guide, 50, secured in position in front of the creasing-blade, substantially as and for the purpose described.

5. The combination of the cam-disks, each provided with a groove, 20, having two inward trends, 21 and 23, and one made nearer the center of the disk than the other, guidebars 2, each having a stud engaging in said groove, and the plunger 8, secured to said 25 guide-bars, whereby said plunger is made to give successive blows at each revolution of the cam-disks, substantially as described.

6. The combination of the cam-disks, each provided with a groove having two inward o trendsone made nearer the center of the disk than the other-the guide-bars 2, each having a stud engaging in said groove, the plunger 3, and a yielding matrix and a creasing-bladeone secured in the lower face of the compress- 3 5 ing-plunger and the other to the platen or bed of the machine-substantially as described.

7. The combination, with the compressingplunger provided with the yielding matrix, the creasing-blade, and the table 16, of the in- 40 clined yielding guide 50, secured in a position in front of the creasing-blade, substantially as and for the purpose set forth.

JOHN E. STANNARD.

VVitnessesz- T. A. GURTIs, CHAS. H. W001). 

